Switch from sample shell to d8 for unit test

test/benchmarks/testcfg.py

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 73 matching lines @@
   def __init__(self, context, root):
     super(BenchmarkTestConfiguration, self).__init__(context, root)
 
   def ListTests(self, current_path, path, mode, variant_flags):
     path = self.context.workspace
     path = join(path, 'benchmarks')
     test = BenchmarkTestCase(path, self.context, mode)
     return [test]
 
   def GetBuildRequirements(self):
-    return ['sample', 'sample=shell']
+    return ['d8']
 
   def GetTestStatus(self, sections, defs):
     pass
 
 def GetConfiguration(context, root):
   return BenchmarkTestConfiguration(context, root)